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Bioelectric Analyses of an Osseointegrated Intelligent Implant Design System for Amputees
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Artificial limb representation in amputees.

Fiona M Z van den Heiligenberg1,2,3, Tanya Orlov4, Scott N Macdonald5

  • 1Institute of Cognitive Neuroscience, University College London, London, UK.

Brain : a Journal of Neurology
|March 14, 2018
PubMed
Summary
This summary is machine-generated.

Brain plasticity allows the visual cortex to adapt to artificial limbs. Increased prosthesis use strengthens neural connections, aiding embodiment and potentially improving rehabilitation strategies for assistive technologies.

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Rehabilitation Engineering

Background:

  • The human brain possesses specialized areas for hand representation in both sensory and visual systems.
  • The potential for repurposing these neural resources for artificial limb control remains an area of investigation.

Purpose of the Study:

  • To investigate whether the brain can adapt neural resources for hand function to represent and control artificial limbs.
  • To explore the relationship between prosthesis usage, neural representation, and inter-network communication in individuals with hand loss.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was used to study individuals with congenital or acquired hand loss (one-handers) and able-bodied controls.
  • Researchers examined the response of visual hand-selective areas to prosthesis images and measured resting-state functional connectivity between visual and sensorimotor hand areas.
  • The correlation between daily prosthesis usage, visual cortex activity, and inter-network communication was analyzed.

Main Results:

  • Higher daily prosthesis usage correlated with stronger responses in visual hand-selective areas to prosthesis images, even for prostheses with different visual features.
  • Intensive daily prosthesis use led to increased functional connectivity between visual and sensorimotor hand areas, proportional to usage.
  • A significant coupling was observed between prosthesis activity, visuomotor connectivity, and usage, suggesting a bidirectional influence.

Conclusions:

  • Altered daily motor behavior, specifically prosthesis use, facilitates prosthesis-related visual processing and shapes neural communication within hand-selective brain areas.
  • These findings suggest a neurophysiological basis for prosthesis embodiment, which could inform the development of improved rehabilitation strategies and assistive technologies.